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Lithographic printing plate precursor and lithographic printing method

a technology of lithographic printing plate and precursor, which is applied in the direction of auxillary/base layers of photosensitive materials, instruments, photosensitive materials, etc., can solve the problems of insufficient printing durability, insufficient technique, and extremely weak image strength

Inactive Publication Date: 2005-01-13
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the method of forming images by mere agglomeration of fine particles with thermal diffusion show good developability on printing press, the strength of images was extremely weak and printing durability was insufficient.
However, even the technique is still insufficient in view of the compatibility between the developability on printing press and the contamination durability and high printing durability.
However, any of the techniques known so far involves a problem of worsening the contamination durability in the non-image area when the adhesion is increased.

Method used

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  • Lithographic printing plate precursor and lithographic printing method
  • Lithographic printing plate precursor and lithographic printing method
  • Lithographic printing plate precursor and lithographic printing method

Examples

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Effect test

example 1

To the support A obtained as described above, a silicate treatment was applied by using an aqueous 1.5 mass % solution of No. 3 sodium silicate at 70° C. for 5 sec in order to ensure the hydrophilicity in a non-image area. The deposition amount of Si was 10 mg / m2. Then, water washing was applied to obtain a support. The center line average roughness Ra of the obtained support was 0.25 μm.

Then, after coating an undercoat layer coating solution (1) of the following composition by using a bar so as to provide 7.5 ml / m2 of liquid volume, it was oven-dried at 80° C. for 10 sec.

Undercoat layer coating solution (1)Water15gMethanol135gThe following compound A0.72g

n = 4 ˜ 5 Compound A

Then, after bar coating an image recording layer coating solution (1) of the following composition, it was oven-dried at 100° C. for 60 sec and an image recording layer at a dry coating amount of 1.0 g / m2 was formed to obtain a lithographic printing plate precursor (1).

Image recording layer coating solut...

example 2

A lithographic printing plate precursor (2) was prepared in the same procedures as those in Example 1 except for changing the addition amount for the compound A of the undercoating layer coating solution (1) in Example 1 from 0.72 g to 0.24 g.

example 3

A lithographic printing plate precursor (3) was prepared in the same procedures as those in Example 2 except for using a compound B instead of the compound A used in Example 2.

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Abstract

A lithographic printing plate precursor comprising: a support; an undercoat layer; and an image recording layer containing a polymerization initiator, a polymerizable compound and an infrared ray absorbing agent, the image recording layer being removable with at least one of a printing ink and a fountain solution, in this order, wherein the undercoat layer contains a compound having (a) an ethylenically unsaturated bond and (b) a functional group capable of adsorbing to a surface of the support.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention concerns a lithographic printing plate precursor and a lithographic printing method using the same. Specifically, it relates to a lithographic printing plate precursor capable of so-called direct print making that can be made-up directly by scanning an infrared laser based on digital signals from a computer or the like as well as a lithographic printing method of developing the lithographic printing plate precursor on a printing press and conducting printing. 2. Description of the Related Art Generally, a lithographic printing plate comprises an oleophilic image area of receiving an ink and a hydrophilic non-image area receiving fountain solution in the printing process. The lithographic printing is a method of causing a difference in the ink depositability at the surface of a lithographic printing plate using an oleophilic image area as an ink receiving area and a hydrophilic non-image area as a fountai...

Claims

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Application Information

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IPC IPC(8): G03F7/004B41C1/10B41N1/14G03C1/76G03F7/00G03F7/11
CPCB41C1/1016B41C2201/04B41C2201/14B41C2210/24B41C2210/08B41C2210/20B41C2210/22B41C2210/04
Inventor MITSUMOTO, TOMOYOSHIMAKINO, NAONORI
Owner FUJIFILM CORP
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